The second part of the pumping process is called the systole. Another electrical pulse from the SA node closes the mitral and tricuspid valves and causes the ventricles to contract. From the right ventricle, blood flows into the pulmonary artery to the lungs to replenish oxygen and get rid of CO2. Oxygenated blood flows into the aortic artery from the left ventricle and to the rest of the body.

So, the two atria receive blood, while the two ventricles send blood out. Your atria and ventricles work together. They contract and relax because of electrical impulses in your heart. When you have atrial fibrillation, your upper chambers quiver. They are out of sync and do not work with the ventricles effectively.

Below is a portion of an animation created by the American Heart Association (AHA). The original is at AHA Atrial Fibrillation.

2) Symptoms of Atrial Fibrillation

There are warning signs of AFib that are important to know. The first is a strange feeling heartbeat; it may be racing, feel as though it is fluttering or pounding or just feel odd. Other symptoms include feeling extremely tired, feeling faint or having shortness of breath. Anxiety and even chest pain can be indicators of a problem for some people.

One problem with Atrial Fibrillation is that you may not experience any indications that you have the condition. This is why having a regular yearly appointment is critical to your health. If you have any of the risk factors for AFib (see next section), you should be checked by your physician.

Other risk factors include high blood pressure, diabetes, sleep apnea, hyperthyroidism, kidney disease and previous heart attack or heart failure. Smoking, drinking alcohol and sometimes too much caffeine can also cause Atrial Fibrillation. Stress, obesity and poor sleep are also triggers to AFib. As you get older, your risk of AFib increases.

5) What Can I Do About AFib

Knowing the risks for Atrial Fibrillation, the symptoms and the fact that some people have no symptoms are important first steps to addressing this condition.

If you have AFib, your doctor can prescribe medications that control the heart’s rhythm. There are also medications available to thin the blood, stopping clots from forming and so reducing the risk of stroke. Surgery is also an option.

September is Atrial Fibrillation Awareness Month

As many as 750,000 hospitalizations and 130,000 deaths a year are caused by AFib. Spread the word. Help save lives.

4 Comments

Several years ago I had fluttering in my chest. I was told that my heart was skipping a beat. After a couple of months it stopped. It wasn’t an everyday thing. Now when I rest my head on my arm, I hear a skip but no fluttering. Should I be concerned? I am 66 and have diabetes. I was told nothing to worry about.

I have PAF and was told it is usually progressive. I can’t take blood thinners as I have had 3 big GI bleeds with no cause found. I was also told that there is a certain age beyond which the AtriaCure ablation procedure cannot be done. I am 74. Should I talk to my Doc about getting that done or is it too late?

We cannot make medical recommendations here. However, it is always important to communicate all of your concerns to your physician and, if you are not satisfied, get a second opinion. Click on the link to learn how to get a second opinion.